When I first demo'd the Divi Powerful Child Theme, I was so excited to be able to finally customize the Divi header and footer, that I purchased the Ultimate Bundle for $175. Shortly after, Divi introduced their Theme Builder into the Divi theme, which made the entire bundle redundant for me, as I could directly customize everthing I needed within Divi. ($250 AUD down the drain) So other than the initial testing of it, I've never actually used the items I purchased in a production environment. I've recently downloaded the updated versions of them, but I'll never use them. I just did it so I don't feel so bad about wasting my money.